Materials of Pipe Fittings
Pipe fittings are important components of pipes and piping systems, and the metal materials used in their manufacture play a critical role in determining their strength, durability and overall performance.
Metal materials for pipe fittings
Table of Contents
In this post, we’ll learn about some of the most commonly used metal materials for pipe fittings, including their properties and applications.
- Stainless Steel: This is a popular choice for fittings due to its high corrosion resistance and staining properties. Stainless steel fittings are commonly used in food processing and medical facilities, as well as in marine environments.
- Carbon Steel: This is a strong and durable material typically used in industrial piping systems. Carbon steel fittings are typically used in high-pressure applications and are known for their ability to withstand extreme temperatures.
- Alloy Steel: This is a combination of steel and other metals such as nickel or chromium, and is known for its high strength and resistance to wear. Alloy steel fittings are commonly used in heavy industrial applications and in the oil and gas industry.
- Monel Alloy: This is a nickel-copper alloy known for its excellent corrosion resistance and high strength. Monel alloy fittings are typically used in the marine environment and chemical processing industries.
- Nickel Alloy: This is a strong and corrosion resistant metal typically used in high temperature applications. Nickel alloy fittings are typically used in the aerospace and chemical processing industries.
- Inconel: This is a nickel-chromium alloy that is known for its excellent corrosion resistance and high temperature strength. Inconel fittings are typically used in the oil and gas industry and power plants.
- Hastelloy: This is a nickel-chromium-molybdenum alloy known for its excellent corrosion resistance. Hastelloy fittings are typically used in the chemical processing industry and the oil and gas industry.
- Copper: This is a soft, malleable metal known for its excellent thermal and electrical conductivity. Copper fittings are commonly used in plumbing systems and electrical wiring.
- Brass: This is an alloy of copper and zinc, known for its strength and corrosion resistance. Brass fittings are typically used in plumbing systems, electrical wiring and the construction industry.
- Bronze: This is an alloy of copper and tin and is known for its strength and durability. Bronze fittings are typically used in marine environments and in the construction industry.
- Titanium: This is a strong, lightweight metal known for its excellent corrosion resistance. Titanium fittings are typically used in the aerospace and chemical processing industries.
- Tantalum: This is a rare, heavy metal known for its excellent corrosion resistance and high-temperature strength. Tantalum parts are typically used in the chemical processing industry and the oil and gas industry.
- Aluminum: This is a lightweight, corrosion-resistant metal known for its excellent thermal conductivity. Aluminum fittings are typically used in the construction and automotive industries.
The metal material of a pipe fitting is an important factor in determining its strength, durability and overall performance. Each material has its own unique characteristics for different applications. It is important to select the right fitting material for the right application to ensure safe and efficient piping and ductwork.
Buttweld Welded Fittings Material Grades
Stainless Steel ASME B16.9 Buttweld Welded Fittings:
ASTM A403 WP316/316L, ASTM A403 SA / A 774 WP-S, WP-W, WP-WX 304/304L, ASTM A182 F316L, 304L, DIN 1.4301, DIN1.4306, DIN 1.4401, DIN 1.4404
Duplex & Super Duplex Steel ASME B16.9 Buttweld Welded Fittings:
ASTM A 815, ASME SA 815 UNS NO S31803, S32205. UNS S32750, S32950. Werkstoff No. 1.4462
Carbon Steel ASME B16.9 Buttweld Welded Fittings:
ASTM A234, ASME SA234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70.
Low Temperature Carbon Steel ASME B16.9 Buttweld Welded Fittings: ASTM A420 WPL3, A420 WPL6
Alloy Steel ASME B16.9 Buttweld Welded Fittings:
ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91
Nickel Alloy ASME B16.9 Buttweld Welded Fittings:
ASTM B336, ASME SB336, Nickel 200 (UNS No. No2200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II), Cupro-Nickel 70/30, CuNi10Fe1Mn, CuNi30Mn1Fe.
ANSI/ASME B16.9 Welded Fittings Specification
| Dimensions | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Sizes | 1/2″NB TO 48″NB IN |
| Types | Welded Fittings, Buttweld Welded Fittings |
| Wall Thickness | Schedule 5S, 10S, 20S, S10, S20, S30, STD, 40S, S40, S60, XS, 80S, S80, S100, S120, S140, S160, XXS and etc. |
| Value Added Services | Hot Dipped Galvanizing, Epoxy & FBE Coating, Electro Polish, Sand Blasting, Threading, Soldering |
| Production Grades | Stainless Steel, Alloy Steel, Duplex, Nickel Alloys, Low temperature Steel, Carbon Steel, Cupro Nickel |
Manufacturing Standards of Welded Fittings
| ASME: | ANSI B16.9, ANSI B16.28, MSS-SP-43 |
| DIN: | DIN2605, DIN2615, DIN2616, DIN2617, DIN28011 |
| EN: | EN10253-1, EN10253-2 |
| ASTM A403 – ASME SA403 | Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings |
| ASME B16.9 | Factory-Made Wrought Fittings Buttwelding |
| ASME B16.25 | Buttwelding Ends |
| ASME B16.28 | Wrought Steel Short Radius Elbows and Buttwelding Returns |
| MSS SP-43 | Wrought and Fabricated Butt-Welding Fittings for Low Pressure, Corrosion Resistant Applications |
www.epowermetals.com can produce pipe fittings of such materials:
| ASTM Standard Material | ASTM A53 A53M Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless |
| ASTM A106 A106M Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service | |
| API 5L Specification for Line Pipe | |
| ASTM A312 A312M Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes | |
| ASTM A234 A234M Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service | |
| ASTM A403 A403M Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings | |
| ASTM A420 A420M Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service | |
| ASTM A860 A860M Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings | |
| ASTM-A733-Standard-Specification-for-Welded-and-Seamless-Carbon-Steel-and-Austenitic-Stainless-Steel-Pipe-Nipples | |
| DIN Standard Material | DIN1629 Seamless Circular Unalloyed Steel Tubes Subject to special requirements |
| DIN 2440 Medium-weight threaded steel tubes | |
| DIN 2441 Steel Tubes Heavy Weight For Suitable For Screwing | |
| GOST Standard Material | GOST-1050 Sized Bars Made of High-Quality Structural Carbon Steel With a Special Surface Finish |
| GOST 8732 Seamless hot-deformed steel pipes-Range of sizes | |
| GOST 19281 Rolled Steel With Enhanced Strength | |
| JIS Standard Material | JIS G3452 Carbon steel pipes for ordinary piping |
| JIS G3454 Carbon steel pipes for pressure service | |
| JIS G3455 Carbon steel pipes for high pressure service | |
| JIS G3456 Carbon steel pipes for high temperature service | |
| JIS G3457 Arc welded carbon steel pipes | |
| JIS G3458 Alloy Steel Pipes | |
| JIS G3459 Stainless steel pipes | |
| JIS G3460 Steel pipes for low temperature service | |
| BS EN Standard Material | BS EN 10255 Non-alloy steel tubes suitable for welding and threading Technical delivery conditions |
| BS EN 10253-1 Butt-Welding Pipe Fittings Part 1: Wrought Carbon Steel for General Use and Without Specific Inspection Requirements | |
| BS EN 10253-2 Butt-welding pipe fittings. part 2: Non alloy ferritic alloy steels with specific inspection requirements | |
| BS EN10253-3 Butt-welding pipe fittings Part 3: Wrought austenitic and austenitic-ferritic (duplex) stainless steels without specific inspection requirements | |
| BS EN 10253-4 Butt-welding pipe fittings Part 4:Wrought austenitic and austenitic-ferritic （duplex）stainless steels with specific inspection requirements |
DIMENSIONS CHART of ANSI/ASME B16.9 WELDED STEEL FITTINGS
| NOMINAL PIPE SIZE | ALL FITTINGS | ALL FITTINGS | ALL FITTINGS | ELBOWS AND TEES | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS | REDUCERS | CAPS |
|---|---|---|---|---|---|---|---|---|---|
| NPS | O.D. at Bevel (1), (2) |
I.D. at End
(1), (3), (4)
|
Wall Thickness (3) | Centre-to-End Dimension A,B,C,M | Centre-to-Centre O | Back-to-Face K | Alignment of Ends U | Overall Length H | Overall Length E |
| ½ to 2½ |
0.06
-0.03
|
0.03 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 3 to 3 ½ | 0.06 | 0.06 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 4 | 0.06 | 0.06 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 5 to 8 |
0.09
-0.06
|
0.06 | Not less than 87.5% of nominal thickness | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.25 |
| 10 to 18 |
0.16
-0.12
|
0.12 | Not less than 87.5% of nominal thickness | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 20 to 24 |
0.25
-0.19
|
0.19 | Not less than 87.5% of nominal thickness | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 26 to 30 |
0.25
-0.19
|
0.19 | Not less than 87.5% of nominal thickness | 0.12 | … | … | … | 0.19 | 0.38 |
| 32 to 48 |
0.25
-0.19
|
0.19 | Not less than 87.5% of nominal thickness | 0.19 | … | … | … | 0.19 | 0.38 |
The butt welding pipe fittings according to standard ANSI/ASME B16.9 and ANSI/ASME B16.28,our butt welding pipe fittings are commonly made from two kinds of raw material:steel pipes and steel plate. To fulfill each requirement of customers and to meet with international specifications and dimensional standards, we follow stringent quality control.The butt welding pipe fitting tolerance within the scope of the following:
Tolerances for all butt welding pipe fittings
Cross-sectional tolerances for all butt welding pipe fittings (ASME/ANSI B16.9 and B16.28)
Cross-sectional tolerances for all butt welding pipe fittings (ASME/ANSI B16.9 and B16.28)
Alignment tolerances are concerned with the way that the ends of a fitting are cut. Exaggerated distortions are shown for clarity in the diagram below.
Butt-Welding-Pipe-Fitting-Draw
Alignment tolerances (ASME/ANSI B16.9 and B16.28)
Alignment Tolerances(ASME/ANSI B16.9 and B16.28)
Tolerances for Specific Fittings
Dimensional tolerances for elbows and returns (ASME/ANSI B16.9 and B16.28):
Dimensional tolerances for elbows and returns (ASME/ANSI B16.9 and B16.28)
Dimensional tolerances for reducers, caps and stub ends (ASME/ANSI B16.9):
